A well-monitored, X-ray selected, tidal disruption event

Saxton, R. D.; Read, A. M.; Komossa, Stefanie; Esquej, P.

doi:10.1051/epjconf/20123902002

Cited by 5 publications

(4 citation statements)

References 14 publications

(17 reference statements)

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“…The hard excess produced by the Inverse Compton effect has a shape which is well approximated by a power-law with slope dependent on the temperature and optical depth of the electrons (see Nishimura et al 1986). This model provides a more physical fit to SDSS 1201+30 (Saxton et al 2012b) and has been used to fit the excess in XMM-Newton and Chandra spectra of TDEs such as 3XMM J150052.0+015452 (Lin et al 2017a). Two popular spectral models are (compbb; Nishimura et al 1986) and (comptt;Titarchuk 1994).…”

Section: X-ray Spectramentioning

confidence: 99%

X-Ray Properties of TDEs

et al. 2020

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Observational astronomy of tidal disruption events (TDEs) began with the detection of X-ray flares from quiescent galaxies during the ROSAT all-sky survey of 1990-1991. The flares complied with theoretical expectations, having high peak luminosities (L x up to ≥ 4 × 10 44 erg/s), a thermal spectrum with kT ∼few×10 5 K, and a decline on timescales of months to years, consistent with a diminishing return of stellar debris to a black hole of mass 10 6−8 M . These measurements gave solid proof that the nuclei of quiescent galaxies are habitually populated by a super-massive black hole. Beginning in 2000, XMM-Newton, Chandra and Swift have discovered further TDEs which have been monitored closely at multiple wavelengths. A general picture has emerged of, initially near-Eddington accretion, powering outflows of highlyionised material, giving way to a calmer sub-Eddington phase, where the flux

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Section: X-ray Spectramentioning

confidence: 99%

X-Ray Properties of TDEs

et al. 2020

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Section: X-ray Spectramentioning

confidence: 99%

Correction to: X-Ray Properties of TDEs

et al. 2021

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Observational astronomy of tidal disruption events (TDEs) began with the detection of X-ray flares from quiescent galaxies during the ROSAT all-sky survey of 1990-1991. The flares complied with theoretical expectations, having high peak luminosities (L x up to ≥ 4 × 10 44 erg/s), a thermal spectrum with kT ∼ few × 10 5 K, and a decline on timescales of months to years, consistent with a diminishing return of stellar debris to a black hole of mass 10 6-8 M . These measurements gave solid proof that the nuclei of quiescent galaxies are habitually populated by a super-massive black hole. Beginning in 2000, XMM-Newton,The Tidal Disruption of Stars by Massive Black Holes

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“…In the X-ray band, several new TDEs were identified with Chandra and XMM-Newton with peak luminosities up to a few times 10 44 erg s −1 and very soft X-ray spectra, located in quiescent host galaxies (e.g., Esquej et al 2008;Maksym et al 2010Maksym et al , 2013Saxton et al 2012b;Donato et al 2014;Lin et al 2015Lin et al , 2017Lin et al , 2022Li et al 2020). Since TDEs are rare events, and their properties like light curve and spectral evolution can vary, identification of each single new event is of great interest.…”

Section: Introductionmentioning

confidence: 99%

A New X-Ray Tidal Disruption Event Candidate with Fast Variability

Hampel¹,

Komossa²,

Greiner³

et al. 2022

Res. Astron. Astrophys.

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During a close encounter between a star and a supermassive black hole, the star might get disrupted by the black hole's tidal forces, resulting in a tidal disruption event (TDE). The accretion of the star's material onto the black hole produces strong emission in different wavelength regimes. Here we report the discovery with ROSAT of an X-ray-selected transient source in an optically non-active galaxy. At the location RA: $13^\mathrm{h}31^\mathrm{m}57.66^\mathrm{s}$ and Dec: $-32^\circ43'19.7''$ a sudden rise in X-ray luminosity by a factor of $8$ within 8 days has been observed. Additionally, a very soft X-ray spectrum with a black-body temperature $kT$=0.1 keV and a peak luminosity of at least $1 \times 10^{43}\,\mathrm{erg/s}$ suggest a TDE interpretation, and the observed properties are very similar to previously identified soft X-ray (ROSAT) TDEs. An optical spectrum taken of the galaxy at this position about six years after the X-ray outburst does not show any emission lines as would be expected from a persistent active galactic nucleus (AGN). The redshift of the galaxy is determined to be 0.051 based on absorption lines. It is therefore likely a member of the galaxy cluster Abell 3560. The rise in X-ray luminosity happens within 8 days and thus appears to be fast for such an event. No X-ray emission was detected 170 days before and 165 days after the event, and none was detected 25 years later with The Neil Gehrels Swift observatory. The change in X-ray luminosity is at least a factor of 40.

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A well-monitored, X-ray selected, tidal disruption event

Cited by 5 publications

References 14 publications

X-Ray Properties of TDEs

X-Ray Properties of TDEs

Correction to: X-Ray Properties of TDEs

A New X-Ray Tidal Disruption Event Candidate with Fast Variability

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